- pentact
- \\ˈpen.ˌtakt\ adjective
Etymology: penta- + -act: having five rays
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pentact /penˈtakt/adjectiveFive-rayednounA five-rayed sponge spiculeORIGIN: ↑pent- and Gr aktīs, aktīnos ray• • •pentactinal /-akˈtin-əl or -ak-tīˈnəl/ adjective
Useful english dictionary. 2012.